Question

If y = tan^-1(sec x+tan x) then dy/dx = ?

A. 1/2

B. -1/2

C. 1

D. none of these

Answer 1

Answer is: A. 1/2

Dividing by cos x/2 in numerator and denominator, we get

Differentiating with respect to x, we get

dy/dx = 1/2